- (void)json2Plist{    NSString *filePath = [self applicationDocumentsDirectoryFileName:@"json"];    NSMutableArray *tempArray = [[NSMutableArray alloc] initWithContentsOfFile:filePath];        //第一次添加数据时,数组为空    if (tempArray.count == 0) {        tempArray = [NSMutableArray array];    }    
　　//文件名(utf-8编码)    NSString *path = [[NSBundle mainBundle] pathForResource:@"city2" ofType:@"txt"];    NSString *contents = [[NSString alloc] initWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];    NSArray  *list = [contents componentsSeparatedByString:@","];        for (NSString *tempStr in list) {        NSDictionary *dict = [tempStr propertyListFromStringsFileFormat];        [tempArray addObject:dict];    }     BOOL success = [tempArray writeToFile:filePath atomically:YES];    NSLog(@"success:%d",success);}#pragma mark - 获取沙盒中的Plist文件路径- (NSString *)applicationDocumentsDirectoryFileName:(NSString *)fileName{    NSString *filePath;    //沙盒中的Document文件夹    NSString *documentDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];      //获取传来的Plist文件名    NSString *fileNameStr = [NSString stringWithFormat:@"%@.plist",fileName];    filePath = [documentDirectory stringByAppendingPathComponent:fileNameStr];    return filePath;}

//txt文本格式示例:
{id = 110000;contents = "北京市";},{id = 120000;contents = "天津市";},{id = 130100;contents = "石家庄市";},{id = 654300;contents = "阿勒泰地区";}